I have H&B bars fitted to my 1100, when err, heermm dropped it in ruts on the Ridgeway recently, it did protect the engine, the rear bracket bent (which I bent back with a large hammer), but the engine was fine, no scratches to it and i could carry on my merry way (though I did loose and indicator and the screen and put a dent in the Tank) how much of this was the pivet effect on the bars i don't know, but I am pretty sure with the damage it did have, it would have been a lot worse without them. just wish i bought the Tank bars that go with them, and that may have saved the Tank,